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J&T Consulting, Inc. <br /> February 9, 2022 p c C E IV n <br /> Mr. Eric Scott FEB 1 '' 2022 <br /> Environmental Protection Specialist DIVISION OF RECLAMATION <br /> State of Colorado <br /> Division of Reclamation, Mining, & Safety MINING &SAFETY-MINERALS <br /> 1313 Sherman Street— Room 215 <br /> Denver, CO 80203 <br /> RE. Broken Arrow Investments, LLC. —Derr Pit— Surety Reduction Request, <br /> File No. M-2008-017, Reclamation Bond Calculations <br /> Dear Mr. Scott, <br /> Broken Arrow Investments, LLC requests a surety reduction based on the approval for the 90-day leak <br /> test on the slurry wall. <br /> The following updates are being provided for reference to complete the surety reduction. <br /> 1. Exhibit L— Reclamation Costs <br /> a. Revision of the financial warranty required for the reclamation of the Phases 1-4 slurry <br /> wall. <br /> 2. 90-day Slurry Wall Leak Test Approval <br /> a. Approval from the Division of Water Resources on the 90-day Slurry Wall Leak Test <br /> Detailed descriptions of these revisions are in the following sections. <br /> Exhibit L - Reclamation Costs <br /> Broken Arrow Investments, LLC requests a reduction of the required financial warranty for the slurry <br /> wall liner to 50% because it has passed the 90-day leak test required by the State Engineer's Office <br /> and approval from the Division of Water Resources has been provided. <br /> 1. A revised Exhibit L — Reclamation Costs and supporting calculations are attached which <br /> summarize the revision to the financial warranty requirements, including a reduction to 50% for <br /> the slurry wall liner component of the bond. The current bond amount is $2,161,816.00 and the <br /> new proposed bond amount would be $1,259,473.00 based on the reduction of 50% of the <br /> slurry wall cost as shown in the attached calculations. <br /> 2. Approval from the Division of Water Resources on the 90-day Slurry Wall Leak Test. <br /> V I� 305 Denver Avenue—Suite D•Fort Lupton CO 80621 -Ph: 303-857-6222•Fax: 303-857-6224 <br />